THE CANADIAN ENTOMOLOGIST. 11 



Both feed upon the soft tissue of the interior of the stalk, and do not pro- 

 duce any enlargement ; the only noticeable effect from the outside is that 

 internodes containing larvae are usually shorter than others. The larvae 

 are footless, about .10 of an inch long when still, and 04. wide in the 

 widest part, tapering to the extremities ; the head transverse, about two 

 thirds as wide as the body in its widest part, with two brown jaws. Color 

 very pale yellow. Like the preceding, there appear to be slight projections 

 from the sides of the body at times. 



Pupa. — At the time of writing this, December 12th, all the specimens 

 1 have are in the larva state. A few went through with their transforma- 

 tions during the summer, but a much smaller number than of the preced- 

 ing species. August 30th, two specimens of the imago were obtained from 

 culms, having gnawed their holes of egress nearly large enough to emerge, 

 but one was so injured in cutting open the stalk that it was not preserved. 

 The form and color of pupa can only be guessed from the empty cases of 

 those found in the culms. 



Described from one female specimen found hatched in a stalk of 

 Elymiis Canadensis, August 30th, t8Si. 



THE OLDEST FIGURES OF NORTH AMERICAN INSECTS. 



BY DR. H. A. HAGEN, CAMBRIDGE, MASS. 



The Gazoi)hylacium of Jacob Petiver, Apothecary in London (died 

 1 7 15) is a very rare book, as the plates and the catalogues were printed 

 and published at different times between 1695 and 17 15. They 

 were collected later and published by Mr. Erapson, an officer of the 

 British Museum and a natural son of Sir Hans Sloane, in 1764, in 

 London, with the title, " Jacobi Petiveri Opera, etc., or Gazophylacium, 

 2 vol. fol." A small volume in 8vo contains the original sheets published 

 by Petiver between 1695 ^'^d 1706. The library of the Museum of 

 Comp. Zool. at Cambridge possesses a copy presented, June 1765 by 

 Emanuel Mendez da Costa, Librarian of the Royal Society, to Thomas 

 Knowlton. The collection of J. Petiver, at least the Lepidoptera, is still 

 preserved in the British Museum, and was seen by me in 1857. Every 

 butterfly is placed lietween two thin plates of mica, fastened with a small 



